Abstract: A card user identification system comprising a card 3 having a fingerprint data of a cardholder being recorded in a data recording unit 32 and having an impressing member adhering portion 31 to which a fingerprint impressing member 7 is adhered, and a card reader 1 including an impressing member adhering means 13, an impressing member removing means 14, a fingerprint pattern reading means 16, a data reading means 17, and a fingerprint verification means 18, wherein the system adheres the member 7 to the predetermined position 31 of the card 3 inserted to the reader 1 before ejecting the card from the device 1. The user impresses his/her fingerprint on the member 7 and reinserts the card, and the system reads the fingerprint pattern of the user on the member 7 of the card being reinserted, verifies the fingerprints to confirm that the card user corresponds to the cardholder, and removes the member 7 before ejecting the card after the identification process is completed.

Abstract: A semiconductor gate array device compatible with ECL and/or TTL, wherein the input buffer unit includes a TTL input stage, an ECL input stage and a common output stage, and the output buffer unit includes a common input stage, an ECL output stage and a TTL output stage. When the device is to be used as a TTL input interface, the TTL input stage and the common output stage are coupled together and when the device is to be used as an ECL input interface, the ECL input stage and the common output stage are coupled together. When used as a TTL output interface, the common input stage and the TTL output stage are coupled together and when used as an ECL output interface, the common input stage and the ECL output stage are coupled together. Therefore, the input/output interfaces exhibit general applicability to meet the user's demands, yet enabling the layout areas of the input and output buffer portions to be decreased.